Miles Mathis' Charge Field
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Crystal structure of willemite - Zn2SiO4 - Glows green under UV Light

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Crystal structure of willemite - Zn2SiO4 - Glows green under UV Light Empty Crystal structure of willemite - Zn2SiO4 - Glows green under UV Light

Post by Chromium6 Fri May 01, 2020 2:12 am

Willemite

Formation and associated minerals

Willemite is usually formed as an alteration of previously existing sphalerite ore bodies, and is usually associated with limestone. It is also found in marble and may be the result of a metamorphism of earlier hemimorphite or smithsonite.[9] Crystals have the form of hexagonal prisms terminated by rhombohedral planes: there are distinct cleavages parallel to the prism-faces and to the base. Granular and cleavage masses are of more common occurrence.[10] It occurs in many places, but is best known from Arizona and the zinc, iron, manganese deposits at Franklin and Sterling Hill Mines in New Jersey. It often occurs with red zincite (zinc oxide) and franklinite (Fe,Mn,Zn)(Fe,Mn)2O4 (an iron rich zinc mineral occurring in sharp black isometric octahedral crystals and masses). Franklinite and zincite are not fluorescent.
Uses

Artificial willemite was used as the basis of first-generation fluorescent tube phosphors. Doped with manganese-II, it fluoresces with a broad white emission band. Some versions had some of the zinc replaced with beryllium. In the 1940s it was largely replaced by the second-generation halophosphors based on the fluorapatite structure. These, in turn have been replaced by the third-generation TriPhosphors.[11][12]

Crystal structure of willemite - Zn2SiO4 - Glows green under UV Light 1050px-Willemite_in_natural_and_ultraviolet_light


Chromium6

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